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Sodium metabisulfite Structure

Sodium metabisulfite

Chemical Properties

Melting point >300 °C (lit.)
Density  1.48
storage temp.  Store at +5°C to +30°C.
solubility  540 g/L (20°C)
form  Powder/Solid
Specific Gravity 1.48
color  White to slightly yellow
Odor Sulphorous
PH Range 4.5 at 50 g/l at 20 °C
PH 3.5-5 (50g/l, H2O, 20℃)
Water Solubility  540 g/L (20 ºC)
Sensitive  Air & Moisture Sensitive
Merck  14,8638
Exposure limits ACGIH: TWA 5 mg/m3
NIOSH: TWA 5 mg/m3
Stability Stable. Incompatible with strong oxidizing agents, strong acids. Contact with strong acids releases a poisonous gas. May be moisture and air sensitive.
InChIKey HRZFUMHJMZEROT-UHFFFAOYSA-L
CAS DataBase Reference 7681-57-4(CAS DataBase Reference)
FDA 21 CFR 182.3766; 582.3766; 173.310
Substances Added to Food (formerly EAFUS) SODIUM METABISULFITE
SCOGS (Select Committee on GRAS Substances) Sodium metabisulfite
EWG's Food Scores 2-4
FDA UNII 4VON5FNS3C
EPA Substance Registry System Sodium metabisulfite (7681-57-4)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H302-H318
Precautionary statements P264-P270-P280-P301+P312-P305+P351+P338-P501
Hazard Codes  Xn,Xi
Risk Statements  22-31-41-36/37/38-52
Safety Statements  26-39-46-36-16
RIDADR  3260
WGK Germany  1
RTECS  UX8225000
TSCA  Yes
HS Code  2832 10 00
PackingGroup  III
Hazardous Substances Data 7681-57-4(Hazardous Substances Data)
Toxicity LD50 orally in Rabbit: 1540 mg/kg LD50 dermal Rat > 2000 mg/kg
NFPA 704:
0
3 0

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